Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
The human eye blinks an average of 4,200,000 times a year.
233
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
Tigers can see 6 times better at night than humans.
305
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Enamel is hardest substance in the human body.
61
Yawns are more contagious among people with closer relationships.
163